fix: failed to load overall pick_order strategy in parameters_setting

examples/hrp/parameters_test.yaml

@@ -4,13 +4,13 @@ config:
     user_agent: [ "iOS/10.1", "iOS/10.2" ]
     username-password: ${parameterize($file)}
   parameters_setting:
+    pick_order: "random"
     strategies:
       user_agent:
         name: "user-identity"
         pick_order: "sequential"
       username-password:
         name: "user-info"
-        pick_order: "random"
     limit: 6
   variables:
     app_version: v1